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GB/T 34205-2017: Metallic materials -- Hardness testing -- Ultrasonic contact impedance method
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| GB/T 34205-2017 | English | 339 |
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Metallic materials -- Hardness testing -- Ultrasonic contact impedance method
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GB/T 34205-2017
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Basic data | Standard ID | GB/T 34205-2017 (GB/T34205-2017) | | Description (Translated English) | Metallic materials -- Hardness testing -- Ultrasonic contact impedance method | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | H22 | | Word Count Estimation | 17,196 | | Date of Issue | 2017-09-07 | | Date of Implementation | 2018-06-01 | | Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China | GB/T 34205-2017: Metallic materials -- Hardness testing -- Ultrasonic contact impedance method---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Metallic materials - Hardness testing - Ultrasonic contact impedance method
ICS 77.040.10
H22
National Standards of People's Republic of China
Metallic materials - Hardness test - Ultrasonic contact impedance method
2017-09-07 Posted
2018-06-01 implementation
General Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
China National Standardization Administration released
Foreword
This standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This standard is proposed by China Iron and Steel Association.
This standard by the National Standardization Technical Committee Steel (SAC/TC183) centralized.
This standard was drafted unit. Shanghai Electric Power Equipment Co., Ltd. Shanghai Steam Turbine Works, Metallurgical Industry Information Standards Institute, Dongguan City
Wang Precision Instrument Co., Ltd.
The main drafters of this standard. Zhu Yue Mei, Jia Guoqing, Dong Li, Zheng Chunping, Li Rongfeng, Liu Si, Fang Jian, Yao long red.
Metallic materials - Hardness test - Ultrasonic contact impedance method
1 Scope
This standard specifies the terms and definitions, principles, symbols and descriptions of the hardness test of ultrasonic contact resistance of metallic materials, test equipment, test
Sample, Test Procedure, Uncertainty of Results, Test Report.
This standard applies to metal materials ultrasonic contact resistance method hardness test is also applicable to the metal coating, coating and hardened layer ultrasonic contact resistance
Anti-method hardness test.
2 Normative references
The following documents for the application of this document is essential. For dated references, only the dated version applies to this article
Pieces. For undated references, the latest edition (including all amendments) applies to this document.
GB/T 4340.1 Vickers hardness test of metallic materials - Part 1. Test methods
GB/T 4340.2 Vickers hardness test of metallic materials - Part 2. Inspection and calibration of hardness tester
GB/T 4340.3-2012 Vickers hardness test of metallic materials - Part 3. Calibration of standard hardness blocks
GB/T 10623 metallic materials mechanical properties test terms
Technical specification of ultrasonic hardness tester
JJF1436 ultrasonic hardness calibration standard
3 Terms and definitions
GB/T 10623 defined and the following terms and definitions apply to this document.
3.1
Ultrasonic contact resistance ultrasoniccontactimpedance; UCI
Ultrasonic vibration frequency pressure head into the metal sample surface, due to the contact area at the indentation caused by vibration of the resonant frequency of the rod
Variety.
3.2
Effective elastic modulus effectiveelasticmodulus
Elasticity of the test system during ultrasonic hardness testing.
Note. The test system consists of vibrating rod, ram and specimen.
4 principle
Ultrasonic contact impedance method is a direct measurement of indentation dynamic press-in method. The end is inlaid with a specific head (such as regular pyramid diamond
Indenter) of the vibrating rod is excited to do vertical ultrasonic vibration, with a certain test force will be pressed into the test surface, the longitudinal vibration of the vibrating rod will
By the impedance, the resonant frequency changes. The amount of variation is proportional to the indentation surface area and the effective modulus of elasticity of the system,
The rate of change is obtained.
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